object GroupFunction
Factory to declare custom call to a group function.
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- def apply(name: String, arg: BSONValue): GroupFunction
Creates a call to specified group function with given argument.
Creates a call to specified group function with given argument.
- name
The name of the group function (e.g.
$sum
)- arg
The group function argument
- returns
A group function call defined as
{ name: arg }
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